I have the following issue: I have added a taxonomy field to my forum comments and it does not work, meaning when I create new comment tags they indeed appear in the comment and even the new tags appears in the tag vocabulary but when I click on the tag there are no contents, as if drupal does not count comments as content.

Use the following PHP code in a custom token to display the comment author's name as a link to either their homepage or their user profile. If they didn't enter a homepage URL and they're an anonymous user, or if accessing user profiles is not allowed, the comment author's name will be displayed without a link.

The Comment module in Drupal allows users to comment on many types of site content, as allowed by the site administrator.

Uses

When Comment module is enabled, users can post comments to discuss a forum topic, a blog post, a book page, etc. Comments behave like other user submissions. Filters, smileys and HTML that work in nodes will also work with comments if configured accordingly.